Theorem bd0 16470

Description: A formula equivalent to a bounded one is bounded. See also bd0r 16471. (Contributed by BJ, 3-Oct-2019.)

Hypotheses

Ref	Expression
bd0.min	⊢ BOUNDED 𝜑
bd0.maj	⊢ (𝜑 ↔ 𝜓)

Assertion

Ref	Expression
bd0	⊢ BOUNDED 𝜓

Proof of Theorem bd0

Step	Hyp	Ref	Expression
1		bd0.min	. 2 ⊢ BOUNDED 𝜑
2		bd0.maj	. . 3 ⊢ (𝜑 ↔ 𝜓)
3	2	ax-bd0 16459	. 2 ⊢ (BOUNDED 𝜑 → BOUNDED 𝜓)
4	1, 3	ax-mp 5	1 ⊢ BOUNDED 𝜓

Syntax hints:   ↔ wb 105  BOUNDED wbd 16458

This theorem was proved from axioms:  ax-mp 5  ax-bd0 16459

This theorem is referenced by:  bd0r  16471  bdth  16477  bdnth  16480  bdnthALT  16481  bdph  16496  bdsbc  16504  bdsnss  16519  bdcint  16523  bdeqsuc  16527  bdcriota  16529  bj-axun2  16561